DK167541B1 - OFFSHORE PLATFORM WITH COMPOSED LEGS - Google Patents
OFFSHORE PLATFORM WITH COMPOSED LEGS Download PDFInfo
- Publication number
- DK167541B1 DK167541B1 DK568186A DK568186A DK167541B1 DK 167541 B1 DK167541 B1 DK 167541B1 DK 568186 A DK568186 A DK 568186A DK 568186 A DK568186 A DK 568186A DK 167541 B1 DK167541 B1 DK 167541B1
- Authority
- DK
- Denmark
- Prior art keywords
- carrier
- offshore platform
- platform
- skirt
- legs
- Prior art date
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
- E02B17/02—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor placed by lowering the supporting construction to the bottom, e.g. with subsequent fixing thereto
- E02B17/027—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor placed by lowering the supporting construction to the bottom, e.g. with subsequent fixing thereto steel structures
Description
i DK 167541 B1in DK 167541 B1
Opfindelsen vedrører en offshore platform med sammensatte ben, omfattende et langstrakt understel med bæreben, som har et diameterreduceret nedre parati, en række skørtpæle, som er indlejret i havbunden og er for-5 bundet med hvert bæreben, og en stiv forbindelse, mellem et bæreben og det tilhørende antal skørtpæle, hvilken stive forbindelse ligger i et niveau over det diameterreducerede nedre parti af bærebenet.The invention relates to an offshore composite leg platform comprising an elongated carrier with a diameter-reduced lower paraty, a series of skirting posts embedded in the seabed and connected to each carrier, and a rigid connection between a carrier and the associated number of skirt posts, which rigidly connect at a level above the diameter-reduced lower portion of the carrier.
Efterhånden som udnyttelsen af olie og gaskilder 10 sker i dybere og dybere vand, er platformkonstruktionerne blevet tilsvarende tungere og dyrere. Dybvandskonstruktioner, der typisk er konstruktioner konstrueret til vanddybder på over 300 m, vejer typisk over ti tusinde ton. Disse konstruktioners enorme vægt og stør-15 relse og den belastning, de udsættes for, gør dem særdeles dyre at bygge, og denne omkostning måles generelt i tusinder af dollar pr. ton. Vægten er også en væsentlig faktor, der indgår i håndterings- og installationsudgifterne, og det er en tommelfingerregel, at jo mindre 20 en dybvandkonstruktion vejer, jo billigere er den at fremstille og installere.As the utilization of oil and gas sources 10 occurs in deeper and deeper water, the platform structures have become correspondingly heavier and more expensive. Deepwater structures, which are typically structures designed for water depths exceeding 300 m, typically weigh over ten thousand tons. The enormous weight and size of these structures and the strain they are subjected to make them extremely expensive to build, and this cost is generally measured in thousands of dollars per day. ton. Weight is also a major factor in handling and installation costs, and it is a rule of thumb that the less 20 a deep water construction weighs, the cheaper it is to manufacture and install.
En god oversigt over udviklingen af offshore platforme med særlig hensyn til dybvandkonstruktioner kan findes i en artikel med titlen "Design and Construc-25 tion of Deep Water Jacket Platforms" af Griff C. Lee, Mechanical Engineering, april 1983, side 26-36. I denne artikel er beskrevet de forskellige typer af dybvandkonstruktioner og deres opbygning og anvendelse. Essensen af artiklen er, at den indikerer, at faste platforme 30 har vist sig at være de mest pålidelige, omkostningseffektive og effektive bæresystemer til rådighed for offshore boring og produktion. Disse platforme er imidlertid nødvendigvis alle særdeles tunge og dyre at fremstille. Generelt ligger to tredjedele af en sådan kon-35 struktions vægt i dens nederste tredjedel, og forbedringer i forankringen af konstruktionen til havbunden, som 2 medfører en reduceret vægt af konstruktionen, er derfor meget ønskværdig. Herudover tilstræbes det også at opnå forbedringer, som reducerer platformsbelastningen, og som eliminerer eller reducerer størrelsen af det over-5 fladeareal af platformen, der er udsat for bølgernes virkning.A good overview of the development of offshore platforms with particular regard to deep water structures can be found in an article entitled "Design and Construction of Deep Water Jacket Platforms" by Griff C. Lee, Mechanical Engineering, April 1983, pages 26-36. This article describes the different types of deepwater structures and their structure and application. The essence of the article is that it indicates that fixed platforms 30 have proven to be the most reliable, cost-effective and efficient support systems available for offshore drilling and production. However, these platforms are necessarily all very heavy and expensive to manufacture. Generally, two-thirds of the weight of such a structure is in its lower third, and improvements in the anchoring of the structure to the seabed, which results in a reduced weight of the structure, are therefore highly desirable. In addition, it is also sought to achieve improvements that reduce the platform load and eliminate or reduce the size of the surface area of the platform exposed to the effect of the waves.
Fra US-patentskrift nr. 3 987 636 kendes en offshore platform af den indledningsvis angivne art, i hvilken skørtpælene er dannet ved at pæleelementer er 1 o drevet ned i havbunden gennem skørtpælebøsninger eller -rør, der er fast forbundet med bærebenenes nedre ender. Mellemrummet mellem pæleelementerne og bøsningerne ud-støbes senere med cement, således at der skabes en stiv forbindelse. Fra GB-patentskrift nr. 1 563 107 kendes en 15 offshoreplatform af førnævnte art, hvor hvert af bærebenene er omsluttet af forholdsvis korte indbyrdes forbundne bøsningser eller skørtpælerør, gennem hvilke pæleelementer neddrives, hvorefter mellemrummet mellem pæleelementerne og bøsningerne udstøbes med cement. Pælee-20 lementerne rager op over bøsningerne og fastholdes af gribeelementer, der er fastgjorte til bærebenene. Gri-beelementerne kan sikres i den lukkede stilling, fx ved udfyldning med epoxymateriale.U.S. Patent No. 3,987,636 discloses an offshore platform of the kind initially provided in which the skirting posts are formed by pile members being driven into the seabed through skirting posts or tubes firmly connected to the lower ends of the carrier legs. The gap between the pile members and the bushings is later molded with cement to form a rigid connection. GB Patent No. 1,563,107 discloses an offshore platform of the aforementioned kind, in which each of the carriers is enclosed by relatively short interconnected bushings or skirting pipes through which the pile members are driven, after which the space between the pile members and the bushes is poured with cement. The pile-20 elements protrude above the bushings and are held by gripping elements attached to the supports. The gripping elements can be secured in the closed position, for example by filling with epoxy material.
Det er hensigten med opfindelsen at tilvejebringe 25 en offshoreplatform, hvor kravene til understellets konstruktion er signifikant reducerede. Det er en anden hensigt med opfindelsen at udnytte bæreevnen af platformens understel på mere effektiv måde og derved udsætte et mindre overfladeareal for bølgepåvirkning, hvilket 30 resulterer i, at bølgekræfterne reduceres. Denne reduktion af bølgekræfterne vil derfor reducere kravene til konstruktionen og vægten af platformen en yderligere hensigt med opfindelsen at angive en platform, som er således forankret ved hjælp af pæle i havbunden, at de 35 dyre nederste understelsrør kan konstrueres, så de udsættes for signifikant reducerede statiske og dynamiske 3 kræfter, idet disse kræfter i stedet overføres til de billigere stålpæle.It is an object of the invention to provide an offshore platform where the requirements for the structure of the chassis are significantly reduced. It is another object of the invention to utilize the load-bearing capacity of the platform's chassis more efficiently, thereby exposing a smaller surface area to wave impact, resulting in reduced wave forces. This reduction of the wave forces will therefore reduce the requirements for the construction and the weight of the platform. A further object of the invention is to provide a platform which is anchored by means of piles in the seabed so that the 35 expensive lower bottom pipes can be designed to be significantly reduced. static and dynamic 3 forces, transferring these forces to the cheaper steel piles instead.
Offshoreplatformen ifølge opfindelsen adskiller sig fra de kendte ved at den har mindst én glideforbin-5 delse, som forbinder bærebenet og samlingen af skørtpæle, hvilken glideforbindelse er udformet til at give bærebenet støtte i tværretningen, medens benet kan bevæge sig aksialt i forhold til skørtpælene, hvilken glideforbindelse er forbundet med det diameterreducerede nedre 10 parti af bærebenet, hvorved aksiale kræfter, forskydningskræfter, vridningsmomenter og bøjningsmomentkræfter overføres fra bærebenene gennem glideforbindelsen og den stive forbindelse til skørtpælene. Herved opnås, at skørtpælene, der omgiver bærebenets parti med reduceret 15 diameter, der fortsætter ned i havbunden, gives en tværgående understøtning samtdig med, at bærebenet kan bevæge sig frit. Aksiale kræfter og bøjningsmomenter overføres gennem den stive forbindelse, der ligger over det diameterreducerede nedre parati af bærebenet, hvorimod 20 glideforbindelsen vil medvirke til at overføre forskydningskræfter.The offshore platform according to the invention differs from the known in that it has at least one sliding connection connecting the carrier and the assembly of skirts, which sliding connection is designed to provide support to the carrier in the transverse direction, while the leg can move axially with respect to the skirts. which sliding joint is connected to the diameter-reduced lower portion of the carrier, whereby axial forces, shear forces, torsional and bending forces are transmitted from the carrier legs through the sliding joint and the rigid connection to the skirts. In this way, the skirt posts surrounding the reduced diameter portion of the carrier which continue down into the seabed are provided with a transverse support while allowing the carrier to move freely. Axial forces and bending moments are transmitted through the rigid joint which is above the diameter-reduced lower parity of the carrier, whereas the sliding joint will assist in transmitting shear forces.
En dybvands offshore platform ifølge opfindelsen har en bærende understel, som er fastgjort på havbunden ved hjælp af flere pæle. Bøsninger for skørtpæle er 25 stift forbundet med de bærende hovedben i platformens understel i en højde over havbunden, som er mindst 30 m, og som kan være op til 100 m eller derover. Hver af disse højtliggende forbindelser med et bærende ben omfatter mindst én plade dimensioneret til at overføre den struk-30 tureile belastning fra understellet til skørtpælene, som er nedrammet i havbunden tæt ved siden af hvert bærende ben. Platformens bærende ben kan være reduceret i størrelse neden under denne forbindelse, fordi de strukturelle kræfter nu bæres af skørtpælene.A deepwater offshore platform according to the invention has a load-bearing chassis which is fixed to the seabed by means of several piles. Skirt pole bushings are rigidly connected to the supporting head legs of the platform's chassis at a height above the sea floor, which is at least 30 m and which can be up to 100 m or more. Each of these high-lying joints with a supporting leg comprises at least one plate sized to transfer the structural load from the chassis to the skirting posts, which are framed in the seabed close to each supporting leg. The platform's supporting legs may be reduced in size below this connection because the structural forces are now carried by the skirt poles.
35 Platformens brøndforing er inkorporeret som en del af den strukturelle opbygning af platformens under- 4 stel og det øverste afsnit af denne foring er udvidet og strækker sig vertikalt op, til forbindelsen med boreriggen. Den resterende del af foringen strækker sig generelt i en vinkel i forhold til vertikalen eller lig-5 ger skråt, idet den forløber stort set parallelt med understellets bærende ben.The well casing of the platform is incorporated as part of the structural structure of the platform chassis and the upper portion of this liner is extended and extends vertically, to the connection with the drilling rig. The remainder of the liner generally extends at an angle to the vertical or is inclined, extending substantially parallel to the supporting leg of the chassis.
Foretrukne udførelsesformer af offshoreplatformen ifølge opfindelsen er angivet i krav 2-5.Preferred embodiments of the offshore platform of the invention are set forth in claims 2-5.
Opfindelsen vil nu blive forklaret ved hjælp af 10 nogle eksempler på udførelsesformer og med henvisning til tegningen, på hvilken fig. 1 er et sidebillede af en dybvandsplatform ifølge opfindelsen, hvor understellet og skørtpælene er illustreret, og hvor afstivningen er udeladt af hensyn 15 til tydeligheden, fig. 2 et snit langs linien 2-2 i fig. 1 visende brøndforingen, fig. 3 et delbillede i noget større målestok visende skørtpælene og deres forbindelse, 20 fig. 4 et delsnit langs linien 4-4 i fig. 3, fig. 5 et snit langs linien 5-5 i fig. 1, fig. 6 et snit langs linien 6-6 i fig. 1, fig. 7 et snit langs linien 7-7 i fig. 1, fig. 8a-f billeder illustrerende installationen 25 af et todelt understel, og fig. 9a-c billeder illustrerende installationen af et udelt understel.The invention will now be explained by way of some examples of embodiments and with reference to the drawing, in which 1 is a side view of a deep water platform according to the invention, in which the chassis and skirt poles are illustrated and where the stiffening is omitted for reasons of clarity; FIG. 2 is a sectional view taken along line 2-2 of FIG. 1 showing the well casing; FIG. 3 is a somewhat larger scale view of the skirts and their connection; FIG. 4 is a partial sectional view taken along line 4-4 of FIG. 3, FIG. 5 is a section along line 5-5 of FIG. 1, FIG. 6 is a sectional view taken on line 6-6 of FIG. 1, FIG. 7 is a sectional view taken along line 7-7 of FIG. 1, FIG. Figures 8a-f illustrate the installation 25 of a two-piece frame, and figs. 9a-c pictures illustrate the installation of an undivided chassis.
Som vist i fig. 1 og 2 er en offshore boreplatform 10 delt i tre generelle sektioner, en dæksektion 30 12, en understels-topsektion 14 og en understels bundsektion 16. De to sidstnævnte sektioner 14 og 16 danner sammen et understel 18. Det bør imidlertid bemærkes, at understellet 18 også kan være udført ud i ét. Dæksektionen 12 er den del af platformen 10, som 35 er beliggende sig over vandoverfladen 20, og denne sektion bærer en borerig 22. Topsektionen 14 er hovedsa- DK 167541 B1 5 gelig sammensat af lange rørformede stålelementer 24 og strækker sig stort set fra havbunden 26 til dæksektionen 12. Bundsektionen 16 er fastgjort til topsektionen 14, så de er ud i ét, og bundsektionen 16 om-5 fatter et aggregat 28 af skørtpæle, som giver en stiv understøtning af platformen 10 og forankrer denne til havbunden 26.As shown in FIG. 1 and 2, an offshore drilling platform 10 is divided into three general sections, a tire section 30 12, a bottom sectional top section 14 and a bottom section section 16. The latter two sections 14 and 16 together form a substructure 18. However, it should be noted that the substructure 18 may also be made in one. The cover section 12 is the part of the platform 10 which is located above the water surface 20 and this section carries a drilling rig 22. The top section 14 is mainly composed of long tubular steel elements 24 and extends largely from the seabed 26 to the deck section 12. The bottom section 16 is attached to the top section 14 so that they are integral, and the bottom section 16 includes a skirt pile assembly 28 which provides a rigid support of the platform 10 and anchors it to the seabed 26.
Som vist i fig. 3 og 4 er skørtpælene 28 fastgjort til understellet 18's bærende hovedben 30. Som 10 vist er fem skørtpælebøsninger 32 stift forbundet til hvert ben 30 ved hjælp af horisontale og vertikale plader 34, henholdsvis 36. I nogle tilfælde kan der imidlertid være forbundet flere eller færre bøsninger 32 afhængigt af arten af byggested, belastning og/eller 15 andre faktorer. Disse bøsningsforbindelsers højde over havbunden 26 er generelt mindst 30 m og kan være op til omkring 100 m eller derover. Under denne højde kan benene 30, som normalt er omkring 5-7 m i diameter, reduceres i størrelse som vist for at spare vægt og re-20 ducere omkostningerne. Dette kan lade sig gøre, fordi kræfterne fra platformen 10 nu overføres gennem de nedrammede skørtpæle 38 til havbunden 26, hvilke pæle er udført af et betydeligt billigere materiale end benene, der er opbygget af rør med stor diameter.As shown in FIG. 3 and 4, the skirt posts 28 are attached to the supporting leg 30 of the support frame 18. As shown, five skirt posts 32 are rigidly connected to each leg 30 by means of horizontal and vertical plates 34 and 36, respectively. In some cases, however, more or fewer may be connected. bushings 32 depending on the type of construction site, load and / or 15 other factors. The height of these bushings above the seabed 26 is generally at least 30 m and may be up to about 100 m or more. Below this height, the legs 30, which are usually about 5-7 meters in diameter, can be reduced in size as shown to save weight and reduce costs. This is possible because the forces from the platform 10 are now transmitted through the skimmed skirting posts 38 to the seabed 26, which are made of a considerably cheaper material than the legs constructed of large diameter tubes.
25 De horisontale og vertikale plader 34 og 36 forbinder bøsningerne 32 for skørtpælene direkte med benene 30, og disse plader overfører aksial-, forskydnings- og bøjningsmomentkræfterne fra benene 30 til de nedrammede skørtpæle 38, der går gennem bøsnin-30 gerne 32. Pælebøsningerne 32 er grupperet tæt omkring hvert ben 30, så afstanden fra benet til hver enkelt pæl er omkring 2 m og afstanden mellem pælene omkring 5 m. Dette er betydeligt mindre end den mere konventionelle afstand på 30 m mellem benet og pælen og en af-35 stand mellem pælene på 8-10 m. Hver bøsning 32 har i sin øverste ende et konisk pælestyr 40 til hjælp ved indsættelsen af skørtpælen 38 gennem bøsningen 32.The horizontal and vertical plates 34 and 36 connect the bushes 32 of the skirt posts directly to the legs 30, and these plates transmit the axial, shear and bending moment forces from the legs 30 to the lowered skirt posts 38 passing through the bushes 30. is grouped tightly around each leg 30 so that the distance from the leg to each pile is about 2 m and the distance between the piles is about 5 m. This is significantly less than the more conventional 30 m distance between the leg and the pile and a distance between the piles of 8-10 m. Each bush 32 has at its top end a tapered pile guide 40 to assist in inserting the skirt pile 38 through the bush 32.
66
Skørtpæleaggregatet 38, som er stift forbundet med det højt beliggende midterafgnit af &§β?t ??, eliminerer behovet for den normalt til en sådan platform krævede dyre og tunge afstivning. Denne vægtbesparelse 5 kan være af en størrelsesorden på 10.000 ton, hvilket vil betyde en stor reduktion af omkostningerne for platformen. De horisontale og vertikale plader 34 og 36, som overfører platformen 10's strukturelle kræfter fra benene 30 til det øver s te område af skørtpælene 38 1 o kræver ingen afstivning på grund af skørtpælenes beliggenhed tæt ved benet og på grund af pladernes strukturelle egenskaber. Som følge heraf bæres det øverste afsnit af platformen 10 af benene 30, medens det neder-ste afsnit af platformen 10 bæres af skørtpillerne 15 32. Platformen 10 er således en platform med sammensatte ben.The skirt pile assembly 38, which is rigidly connected to the high central section of & §β? T ??, eliminates the need for the expensive and heavy stiffening normally required for such a platform. This weight saving 5 can be of the order of 10,000 tonnes, which will greatly reduce the cost of the platform. The horizontal and vertical plates 34 and 36 which transfer the structural forces of the platform 10 from the legs 30 to the upper region of the skirt poles 38 10 do not require any stiffening due to the location of the skirt poles close to the leg and due to the structural properties of the plates. As a result, the upper portion of the platform 10 is supported by the legs 30, while the lower portion of the platform 10 is supported by the skirt piles 15 32. The platform 10 is thus a composite leg platform.
En række tværstillede pæleforbindelser 42, der er vist fastgjort til det formindskede afsnit af benet 30, holder skørtpælene 38, der strækker sig ned i hav-20 bunden 26 parallelle med benene 30. Pæleforbindelserne 42 giver en tværgående understøtning af skørtpælene 38, og forbindelserne 42 er sædvanligvis ikke dimensioneret til at overføre en aksial eller bøjningsmomentkraft til understellet 18. De til pæleforbindelserne 42 25 hørende bøsninger 32 er som vist lidt større end skørtpælene 38, og hver bøsning 32 har et konisk styr 44 som hjælp ved indsættelse af en pæl gennem bøsningen.A series of transverse pile joints 42 shown attached to the diminished portion of leg 30 hold skirt poles 38 extending into sea floor 26 parallel to legs 30. Pole joints 42 provide transverse support of skirt poles 38 and joints 42 is usually not dimensioned to transmit an axial or bending torque force to the chassis 18. The bushings 32 of the pile connections 42 25 are, as shown, slightly larger than the skirt piles 38, and each bush 32 has a tapered guide 44 to assist in inserting a pile through the bushing. .
Fig. 5, 6 og 7 viser tværsnit i understellet 18 30 i forskellige niveauer under havoverfladen 20. Fig. 5 viser et snit i det niveau, hvor benene 30 ændrer sig fra at stå skråt til at være orienteret næsten vertikalt. Fig. 6 og 7 illustrerer, hvor tæt skørtpælene 38 er beliggende ved deres respektive ben 30. Bemærkelses-35 værdig er også formindskelsen af benene 30's diameter mellem fig. 6 og fig. 7. Ekstra bærende ben 46 belig- 7 gende i understellet 18 tilvejebringer yderligere understøttelse af platformen 10.FIG. 5, 6 and 7 show cross sections of the support frame 18 30 at various levels below the sea surface 20. FIG. 5 shows a section at the level where the legs 30 change from standing obliquely to being oriented almost vertically. FIG. 6 and 7 illustrate how close the skirt posts 38 are located at their respective legs 30. Noteworthy is also the reduction in the diameter of the legs 30 between FIG. 6 and FIG. 7. Extra supporting legs 46 located in the support frame 18 provide additional support for the platform 10.
Fig. 1 og 2 viser også, at brøndforinger 48 er dele af understelstrukturen. Det øverste afsnit 50 af 5 en brøndforing 48 er udvidet, således at der er tilstrækkelig plads til brøndhovedet. Før foringen når vandoverfladen 20, reduceres den imidlertid i størrelse for at formindske de bølgekræfter, platformen 10 udsættes for. Dette øverste afsnit 50 er også vertikalt 10 orienteret i modsætning til den resterende del af foringen 48, som er skrå eller forløber under en vinkel. Dette øverste ekspanderede og vertikale afsnit tillader, at boringen kan foregå som en normal vertikal boring, hvorved man eliminerer behovet for borerigge til skrå boring 15 og den dermed følgende højere omkostning. Tidligere krævedes der ofte sådanne rigge til skrå boring, når det ønskedes at udnytte brøndforingen som en indbygget del af understelstrukturen, som følge af det skrå forløb af brøndforingen/den strukturelle komponent.FIG. 1 and 2 also show that well casings 48 are parts of the chassis structure. The upper section 50 of 5 a well liner 48 is expanded so that there is sufficient space for the well head. However, before the liner reaches the water surface 20, it is reduced in size to reduce the wave forces to which the platform 10 is subjected. This upper section 50 is also oriented vertically in contrast to the remaining portion of the liner 48 which is inclined or extending at an angle. This upper expanded and vertical section allows the drilling to proceed as a normal vertical bore, eliminating the need for drilling rigs for inclined bore 15 and the resulting higher cost. Previously, such rigs were often required for oblique drilling when it was desired to utilize the well liner as an integral part of the chassis structure due to the oblique course of the well liner / structural component.
20 Fig. 8a-f illustrerer de forskellige trin under installationen af en flerdelt platform. Indledningsvis slæbes bundsektionen 16 af understellet til byggestedet og rettes op i forhold til en undersøisk skabelon 52, før skørtpæle 38, der er nedrammet i havbunden, 25 forankrer bundsektionen 16 på sin plads. Derefter slæbes topsektionen 14 på lignende måde til byggestedet og sættes i søen fra prammen, hvorefter udvalgte rør i konstruktionen vandfyldes, så opdriften af sektionen kan styres. Topsektionen 14 positioneres derefter over 30 bundsektionen 16 og fastgøres til denne ved hjælp af ikke viste tappe. Derefter følger dæksektionen 12, som løftes på plads på topsektionen 14.FIG. 8a-f illustrate the various steps during the installation of a multi-part platform. Initially, the bottom section 16 of the chassis is dragged to the construction site and is aligned with a submarine template 52, before skirting posts 38, which are framed in the seabed, anchor the bottom section 16 in place. Then the top section 14 is similarly dragged to the construction site and placed in the lake from the barge, after which selected pipes in the structure are water filled so that the buoyancy of the section can be controlled. The top section 14 is then positioned above the bottom section 16 and secured to it by pins not shown. Then follows the tire section 12, which is lifted in place on the top section 14.
Fig. 9a-c illustrerer installationen af et udelt understel 18. Efter at understellet 18 er slæbt til 35 stedet og søsat, rettes den op over skabelonen 52, før skørtpælene 38 nedrammes for at forankre understellet 18 på havbunden 26.FIG. 9a-c illustrate the installation of a undivided chassis 18. After the chassis 18 is towed to the site and launched, it is aligned over the template 52 before the skirt posts 38 are lowered to anchor the chassis 18 on the seabed 26.
Claims (5)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/823,556 US4705430A (en) | 1986-01-29 | 1986-01-29 | Composite leg platform |
| US82355686 | 1986-01-29 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DK568186D0 DK568186D0 (en) | 1986-11-26 |
| DK568186A DK568186A (en) | 1987-07-30 |
| DK167541B1 true DK167541B1 (en) | 1993-11-15 |
Family
ID=25239086
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK568186A DK167541B1 (en) | 1986-01-29 | 1986-11-26 | OFFSHORE PLATFORM WITH COMPOSED LEGS |
Country Status (19)
| Country | Link |
|---|---|
| US (1) | US4705430A (en) |
| EP (1) | EP0231056B1 (en) |
| JP (1) | JPS62178616A (en) |
| AR (1) | AR243626A1 (en) |
| AU (1) | AU565069B2 (en) |
| BR (1) | BR8700327A (en) |
| CA (1) | CA1256296A (en) |
| DE (1) | DE3761914D1 (en) |
| DK (1) | DK167541B1 (en) |
| ES (1) | ES2014467B3 (en) |
| GR (1) | GR3000388T3 (en) |
| IE (1) | IE59062B1 (en) |
| IN (1) | IN164329B (en) |
| MX (1) | MX163681B (en) |
| MY (1) | MY100008A (en) |
| NO (1) | NO168491C (en) |
| NZ (1) | NZ218151A (en) |
| PT (1) | PT84070B (en) |
| ZA (1) | ZA87142B (en) |
Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4696603A (en) * | 1985-12-05 | 1987-09-29 | Exxon Production Research Company | Compliant offshore platform |
| US4968180A (en) * | 1986-10-24 | 1990-11-06 | Doris Engineering | Oscillating marine platform connected via a shear device to a rigid base |
| FR2605656B1 (en) * | 1986-10-24 | 1990-10-12 | Doris Engineering | OSCILLATING RIGID-BASED MARINE PLATFORM |
| US5102266A (en) * | 1990-09-10 | 1992-04-07 | Cbs Engineering, Inc. | Offshore support structure |
| US5379844A (en) * | 1993-02-04 | 1995-01-10 | Exxon Production Research Company | Offshore platform well system |
| GB9321078D0 (en) * | 1993-10-13 | 1993-12-01 | Kvaerner Earl & Wright | Offshore tower structure and method of installation |
| AU685637B2 (en) | 1994-05-02 | 1998-01-22 | Shell Internationale Research Maatschappij B.V. | A method for templateless foundation installation of a TLP |
| US5988949A (en) * | 1996-01-11 | 1999-11-23 | Mcdermott Int Inc | Offshore jacket installation |
| US5899639A (en) * | 1996-02-22 | 1999-05-04 | Mcdermott International, Inc. | Offshore structure for extreme water depth |
| DE19705946A1 (en) * | 1997-02-17 | 1998-08-20 | Audi Ag | Method and device for determining the remaining part of an oil change interval of an internal combustion engine |
| GB2323402B (en) * | 1997-03-20 | 2001-10-03 | Mcdermott Internat Inc | Offshore structures |
| NL1014314C2 (en) * | 2000-02-08 | 2001-08-09 | Heerema Marine Contractors Nl | Method for removing or installing an underframe from an offshore platform. |
| US6955503B1 (en) * | 2003-10-21 | 2005-10-18 | Shivers Iii Robert Magee | Method for salvaging offshore jackets |
| US20060054328A1 (en) * | 2004-09-16 | 2006-03-16 | Chevron U.S.A. Inc. | Process of installing compliant offshore platforms for the production of hydrocarbons |
| ES2378960B1 (en) * | 2010-09-22 | 2013-02-25 | Inneo Torres S.L. | TOWER INSTALLATION PROCEDURE FOR WATER USE IN. |
| US20130272796A1 (en) * | 2011-09-26 | 2013-10-17 | Horton Wison Deepwater, Inc. | Modular Relocatable Offshore Support Tower |
| GB201206400D0 (en) * | 2012-04-11 | 2012-05-23 | Offshore Group Newcastle Ltd | Offshore structure installation |
| WO2017011417A1 (en) | 2015-07-12 | 2017-01-19 | iSIMS LLC | Structural support system and methods of use |
| CN110195427A (en) * | 2019-07-01 | 2019-09-03 | 青岛理工大学 | Assembled aluminum pipe-confined concrete-steel pipe combination offshore jacket platforms |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB563107A (en) * | 1942-04-30 | 1944-07-28 | British Thomson Houston Co Ltd | Improvements in and relating to electric thermal control devices |
| US3528254A (en) * | 1968-12-03 | 1970-09-15 | Global Marine Inc | Offshore platform structure and construction method |
| US3729940A (en) * | 1970-02-20 | 1973-05-01 | Brown & Root | Offshore tower |
| US3685300A (en) * | 1970-10-19 | 1972-08-22 | Texaco Inc | Marine platform with curved support leg |
| US3987636A (en) * | 1975-04-30 | 1976-10-26 | Brown & Root, Inc. | Methods and apparatus for anchoring a submerged structure to a waterbed |
| US4026227A (en) * | 1975-09-02 | 1977-05-31 | Brown & Root, Inc. | Method and apparatus for connecting and disconnecting a supportive buoyant structure to and from an offshore tower jacket |
| US4014176A (en) * | 1975-09-04 | 1977-03-29 | Brown & Root, Inc. | Methods and apparatus for applying buoyant forces to offshore tower legs and providing and enclosing buoyancy chambers |
| JPS5616255Y2 (en) * | 1976-12-19 | 1981-04-16 | ||
| GB1563107A (en) * | 1976-12-23 | 1980-03-19 | British Petroleum Co | Piling |
| US4184790A (en) * | 1977-03-01 | 1980-01-22 | C. Nelson Shield, Jr., Trustee | Submerged pile grouting |
| JPS53142701U (en) * | 1977-04-18 | 1978-11-10 | ||
| US4126008A (en) * | 1977-09-02 | 1978-11-21 | Standard Oil Company (Indiana) | Sea-floor template |
| GB1595629A (en) * | 1978-05-31 | 1981-08-12 | Pilgrim Eng Dev | Structural joints |
| US4214843A (en) * | 1979-01-03 | 1980-07-29 | Brown & Root, Inc. | Subsea grout distributor |
| US4275974A (en) * | 1979-02-15 | 1981-06-30 | Halliburton Company | Inflation and grout system |
| US4576523A (en) * | 1983-11-25 | 1986-03-18 | Exxon Production Research Co. | Pile release mechanism |
| US4556342A (en) * | 1984-05-08 | 1985-12-03 | Union Oil Company Of California | Method of fabricating a broad-based submersible structure |
-
1986
- 1986-01-29 US US06/823,556 patent/US4705430A/en not_active Expired - Lifetime
- 1986-10-28 IN IN789/CAL/86A patent/IN164329B/en unknown
- 1986-11-03 NZ NZ218151A patent/NZ218151A/en unknown
- 1986-11-17 AU AU65368/86A patent/AU565069B2/en not_active Expired
- 1986-11-18 JP JP61273065A patent/JPS62178616A/en active Granted
- 1986-11-26 DK DK568186A patent/DK167541B1/en not_active IP Right Cessation
- 1986-11-27 NO NO864774A patent/NO168491C/en not_active IP Right Cessation
- 1986-12-23 MX MX4772A patent/MX163681B/en unknown
-
1987
- 1987-01-06 PT PT84070A patent/PT84070B/en active IP Right Grant
- 1987-01-07 ES ES87300087T patent/ES2014467B3/en not_active Expired - Lifetime
- 1987-01-07 EP EP87300087A patent/EP0231056B1/en not_active Expired - Lifetime
- 1987-01-07 DE DE8787300087T patent/DE3761914D1/en not_active Expired - Fee Related
- 1987-01-09 ZA ZA87142A patent/ZA87142B/en unknown
- 1987-01-14 CA CA000527349A patent/CA1256296A/en not_active Expired
- 1987-01-20 IE IE13687A patent/IE59062B1/en not_active IP Right Cessation
- 1987-01-21 MY MYPI8700052A patent/MY100008A/en unknown
- 1987-01-26 BR BR8700327A patent/BR8700327A/en not_active IP Right Cessation
- 1987-08-21 AR AR87306540A patent/AR243626A1/en active
-
1990
- 1990-03-15 GR GR90400125T patent/GR3000388T3/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62178616A (en) | 1987-08-05 |
| NO864774D0 (en) | 1986-11-27 |
| JPH0364650B2 (en) | 1991-10-08 |
| DK568186A (en) | 1987-07-30 |
| AR243626A1 (en) | 1993-08-31 |
| AU6536886A (en) | 1987-07-30 |
| US4705430A (en) | 1987-11-10 |
| AU565069B2 (en) | 1987-09-03 |
| PT84070A (en) | 1987-02-01 |
| ZA87142B (en) | 1987-09-30 |
| IE870136L (en) | 1987-07-29 |
| BR8700327A (en) | 1987-12-08 |
| NO168491B (en) | 1991-11-18 |
| MX163681B (en) | 1992-06-12 |
| ES2014467B3 (en) | 1990-07-16 |
| IE59062B1 (en) | 1993-12-15 |
| DK568186D0 (en) | 1986-11-26 |
| CA1256296A (en) | 1989-06-27 |
| IN164329B (en) | 1989-02-18 |
| EP0231056A3 (en) | 1987-11-25 |
| NZ218151A (en) | 1989-03-29 |
| DE3761914D1 (en) | 1990-04-19 |
| GR3000388T3 (en) | 1991-06-07 |
| NO168491C (en) | 1992-02-26 |
| NO864774L (en) | 1987-07-30 |
| PT84070B (en) | 1993-01-29 |
| MY100008A (en) | 1989-03-16 |
| EP0231056B1 (en) | 1990-03-14 |
| EP0231056A2 (en) | 1987-08-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DK167541B1 (en) | OFFSHORE PLATFORM WITH COMPOSED LEGS | |
| US5118221A (en) | Deep water platform with buoyant flexible piles | |
| KR102317990B1 (en) | Float support structures for offshore wind turbines and methods for installing wind turbines with such support structures | |
| US4810135A (en) | Compliant offshore structure with fixed base | |
| KR20110030628A (en) | Support structure for use in the offshore wind farm industry | |
| SE467156B (en) | SETTING TO INSTALL THE OVERBUILD OF A OFFSHORE PLATFORM | |
| US4566824A (en) | System for drilling from a water surface, which is insensitive to the swell | |
| NO174920B (en) | Flexible marine platform with surface production well heads | |
| NZ209626A (en) | Flexible offshore platform | |
| US4696604A (en) | Pile assembly for an offshore structure | |
| US4421438A (en) | Sliding leg tower | |
| KR20140144220A (en) | Structures for offshore installations | |
| DK153959B (en) | OFFSHORE DRILLING AND PRODUCTION CONSTRUCTION | |
| NO340272B1 (en) | Underwater Tank System | |
| NO143637B (en) | SECTION FOR ANCHORING A CONSTRUCTION TO THE SEA | |
| NO329399B1 (en) | Procedure for mounting an offshore structure on the seabed | |
| NO172755B (en) | OSCILLATING OFF-SHORE PLATFORM | |
| GB2222190A (en) | Installing large, heavy structures on the sea bottom | |
| NO311335B1 (en) | Deep-water drawbar system for drawbar platforms | |
| CN214998031U (en) | Floating type fan foundation | |
| US4443131A (en) | Method for constructing an offshore platform structure having a plurality of supporting legs inclined inwardly towards each other | |
| NO142535B (en) | FRONT DRAWING FOR GREAT DEPTHS. | |
| US20150037103A1 (en) | Cellular tendons for tlp | |
| EP0939723B1 (en) | Anchor | |
| EP0178311A1 (en) | Gravity platform for great water depth, method of manufacturing same, and use of such a platform |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| B1 | Patent granted (law 1993) | ||
| PBP | Patent lapsed |